/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc.  Portions Copyrighted 2008 Richard Schilling.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s): Richard Schilling (coderroadie@gmail.com)
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.mail.util;

import java.io.*;
import javax.mail.MessagingException;

/**
 * This class is to support writing out Strings as a sequence of bytes
 * terminated by a CRLF sequence. The String must contain only US-ASCII
 * characters.
 * <p>
 * The expected use is to write out RFC822 style headers to an output stream.
 * <p>
 * 
 * @author John Mani
 */

public class LineOutputStream extends FilterOutputStream {

    private static byte[] newline;

    static {
        newline = new byte[2];
        newline[0] = (byte) '\r';
        newline[1] = (byte) '\n';
    }

    public LineOutputStream(OutputStream out) {
        super(out);
    }

    public void writeln(String s) throws MessagingException {
        try {
            byte[] bytes = ASCIIUtility.getBytes(s);
            out.write(bytes);
            out.write(newline);
        } catch (Exception ex) {
            throw new MessagingException("IOException", ex);
        }
    }

    public void writeln() throws MessagingException {
        try {
            out.write(newline);
        } catch (Exception ex) {
            throw new MessagingException("IOException", ex);
        }
    }
}
